Improvement in pumps



NORMANW. WHEELER.

`lmpr0vemen1in Pumps.

Patented Nqv.14,1-871.

Wl'nesse.

UNITED STATES PATENT OEEIGE.

NORMAN W. WHEELER, OF MORRISTOWN, NEW JERSEY.

IMPROVEMENT IN PUMPS.

Speciiication forming part of Letters Patent No. 120,841, dated November14, 1871.

To all whom t may concern:

Be it known that I, N oRMAN W. WHEELER, of Morristown, in the county ofMorrisv and State of New Jersey, have invented certain Improvements inBoiler-Feeding Devices, of which the following is a specification:

This invention consists essentially of a feedpump, to be actuated by theplay of plus and minus pressures to which liquid is subjected in adouble or double-acting steam or other pump.

Figure 1 is a sectional elevation of a machine embodying my invention,and Fig. 2 is an end elevation of the same.

In the drawing forming a part of this specification, a is a barrel, 'andd a plunger tting reasonably tight-therein. e is a ram attached to andof less diameter than the plunger d, iitting reasonably tight in thebarrel b, and Working through the chamber c. h is a recess, so formedthat when the end of c reaches and enters it a Water-cushion will beformed to arrest the motion of d and e. The recess q and projection fupon the plunger e make a water-cushion for the arrest of the motion ofd and e when moving toward the left. 'i and j are pipes connecting-bythe passages w and y with the ends ofthe barrel a. The pipes t' and jare to be connected by means of the lianges c v to the two ends of thesteam or other pump above the receiving-valves and below thedelivery-valves-that is to say, in such a manner that when plus pressureexists in one end of the pump-barrel or in one working-vessel and minuspressure in the other, plus pressure will also exist, say to the rightof d, and minus pressure to the left of d, within the barrel a, and viceversa, which condition of pressure Will, resistances permitting, causethe plunger d and ram e to traverse from right to left, and from left toright, alternately, in response to the play and change of plus and minuspressures in the pump from which the motions are to be derived. Thechamber la communicates, as shown, with the right end of the barrel a,and above it is placed the clack-valve Zin its chamber u, acommunication with the chamber c being effected by the fm n, so thatwhen the ram e is moved toward the left Water will be drawn into c froma. ois a clack-valve in its. chamber t, and p is a pipe which mustconnect the chamber t with the steamgenerator, so that when the ram e ismoved toward the right Water contained in the chamber c will be forcedinto the generator. It is obvious that the pressure attainable in thepipe p is nearly equal to the plus pressure of the actuating pump,multiplied by the area of d plus the minus pressure, multiplied by thearea ofd (minus the area of e) divided by the area of e,- and as thearea of e is less than that of (l the pressure existing in pmay exceedthat existing in the pipes t' or j. Should it happen that the Waterpassing through the actuating pump is not iit for feed-Water it will bewell to close the passage between the barrel c and chamber 7c and attachto la a pipe leading to a body of purer Water.

I claim- The combination ofthe barrels a and b, plunger d, and ram ewith the pipes i and j and valves l and o, substantially in the mannerand forthe purposes described.

NORMAN W. WHEELER.

